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| Patents for Post & Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 135,549 | Feb. 04, 1873 | H.W. Hewet | Improvements in Card-Punching Instruments for Railroad Conductors' Use | ticket | |
| 147,297 | Feb. 10, 1874 | F. White | Improvement in sharpening-machines | sharpening machines | |